This will be my last and only 3DP adapter... for this reason the circuit has some imperfections...
BTW it works...

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[*] Images recycled.

Thanks to Grendel, I shrinked the board (using smd components) and make it to fit into a parallel plastic shield. The adapter works perfectly!!!!
Thanks again Grendel!!! As I promised I'll send you Protel PCB.

Grendel
is it possible to have the firmware to program ATMega?